Silicon metal is produced via pyrometallurgical process in an electric smelter, where quartz with silicon dioxide content above 98% is reduced in carbothermic reaction to metallic silicon with silicon content greater than 98.5%, depending on the grade of the silicon metal.
Outotec is a leading technology supplier for various smelting applications in many industries. Our portfolio includes electric smelting technologies for various ferroalloys, including silicon metal. Our silicon metal technology ensures smooth furnace operation and end product with the highest possible level of purity. The solution can be fully customized according to customer requirements. All technologies have been developed by Outotec, allowing worry-free integration of the process design and equipment. Our technology offering covers the whole smelting process from the feed system to metal tapping. The core technologies include electrode equipment (for carbon or compound electrodes), electrode sealing, water-cooled gas hood, furnace shell, and rotating table. By choosing Outotec silicon metal smelter the most environmentally friendly and cost-efficient silicon metal can be produced; making our everyday life carbon footprint lower.